GREAT PLAINS PL5500, Operator'S Manual, Page: 87 / 109

Great Plains | 411-633M | 10/21/2021 80
PL5500 Planter Table of Contents Index Troubleshooting
Seed Population Too High
Problem Cause Solution
Overall high
population
Incorrect seed rate Check seed rate charts.
Incorrect ground drive transmission
or range sprockets used Check transmission and range sprocket tooth counts and
DRIVING/DRIVEN locations (page 35).
Two seeds per cell on the disk due to
excess meter pressurization Decrease the controlled air to the meter (page 29).
Two seeds per cell on the disk due to
cells too large for the seed Select a disk with smaller cells.
The meter pressurization is too high,
as confirmed by gauge Reduce fan speed.
Air meter pressure too high due to
pressure sensor not zeroed properly. Re - zero the gauge with the fan off. Make sure the
displayed pressure reads 0.00.
Air pressure too high, but gauge is
within range or reading low Compare the air pressure reported on the console to the
mechanical gauge. If they do not match:
 Inspect the sample lines from the row units up to the
sensor chamber for leaks.
 Re-zero the air pressure with the fan off.
False alarms or actual seed rate
errors due to seed monitoring system
setup with incorrect row count,
spacing, or active rows Review planter configuration and seed monitoring system
setup. See
the console manual for instructions for your
seed monitoring system.
Incorrect cell count Replace seed disks with correct disks, or reset rate for
current disks, if within range.
Doubles due to incorrect disk for crop
or seed size Use recommended disk for crop and seed size. See
Material Rate manual.
Sticky seeds from excess seed
treatment Increase seed lubricant (page 31).
Overlapping passes Check marker extension (page 48).
For GPS, check planter size programmed.
Actual field size is different Population may be correct, and calculations are not.
Seed monitoring system
under
- reporting area
Readings can vary with conditions (wheel slippage, and
effective rolling radius in soft soils) and planting patterns.
High
population,
single row
Excess meter pressurization causing
doubles Check seed inlet gate.
Worn seed - drop brush and/or strip
brushes allowing excess seed to
pass
Replace worn brushes (page 58).
Worn meter bearing causing seed
disk wobble and doubles Replace meter bearing.
Incorrect seed disk with higher cell
count Install correct disk.